body {
    background: linear-gradient(135deg, #181c2b 0%, #232946 100%);
    min-height: 100vh;
    color: #f3f6fa;
}

.container {
    background: rgba(30,34,54,0.95);
    border-radius: 18px;
    box-shadow: 0 8px 32px #1e90ff22;
    padding: 40px 40px 32px 40px;
    margin: 80px auto;
    max-width: 900px;
}

h1, h2, .site-title {
    color: #1e90ff;
    font-weight: bold;
    letter-spacing: 2px;
    text-shadow: 0 2px 8px #1e90ff44;
    animation: fadeInDown 1s;
    text-align: center;
}

.book-table, table {
    background: #232946;
    color: #f3f6fa;
    border-radius: 12px;
    overflow: hidden;
}

.book-table th, .book-table td, table th, table td {
    vertical-align: middle;
    border-color: #2c2f4a;
}

.book-table thead, table thead {
    background: #1e90ff;
    color: #fff;
    border: none;
}

.add-btn, .logout-btn, .edit-link, .delete-link, .btn {
    background: #232946;
    color: #fff;
    border: 1px solid #1e90ff;
    border-radius: 8px;
    transition: background 0.2s, box-shadow 0.2s, color 0.2s, transform 0.2s;
}

.add-btn:hover, .logout-btn:hover, .edit-link:hover, .delete-link:hover, .btn:hover {
    background: #1e90ff;
    color: #fff;
    box-shadow: 0 0 12px #1e90ff88, 0 0 2px #fff;
    transform: scale(1.08);
}

.action-cell a {
    margin-right: 10px;
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-30px); }
    to { opacity: 1; transform: translateY(0); }
}